lower-subreg.c (resolve_simple_move): Copy REG_INC note.

gcc/ChangeLog:
2013-10-31  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	* lower-subreg.c (resolve_simple_move): Copy REG_INC note.

gcc/testsuite/ChangeLog:
2013-10-31  Zhenqiang Chen  <zhenqiang.chen@linaro.org>

	* gcc.target/arm/lp1243022.c: New test.

From-SVN: r204247

4 files changed, 232 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 966b4a5..fab5bc5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2013-10-31  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
+
+	* lower-subreg.c (resolve_simple_move): Copy REG_INC note.
+
 2013-10-30  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR bootstrap/58933
diff --git a/gcc/lower-subreg.c b/gcc/lower-subreg.c
index ebf364f..e67bc35 100644
--- a/gcc/lower-subreg.c
+++ b/gcc/lower-subreg.c
@@ -967,7 +967,20 @@ resolve_simple_move (rtx set, rtx insn)
       rtx reg;
 
       reg = gen_reg_rtx (orig_mode);
+
+#ifdef AUTO_INC_DEC
+      {
+	rtx move = emit_move_insn (reg, src);
+	if (MEM_P (src))
+	  {
+	    rtx note = find_reg_note (insn, REG_INC, NULL_RTX);
+	    if (note)
+	      add_reg_note (move, REG_INC, XEXP (note, 0));
+	  }
+      }
+#else
       emit_move_insn (reg, src);
+#endif
       src = reg;
     }
 
@@ -1057,6 +1070,16 @@ resolve_simple_move (rtx set, rtx insn)
 	mdest = simplify_gen_subreg (orig_mode, dest, GET_MODE (dest), 0);
       minsn = emit_move_insn (real_dest, mdest);
 
+#ifdef AUTO_INC_DEC
+  if (MEM_P (real_dest)
+      && !(resolve_reg_p (real_dest) || resolve_subreg_p (real_dest)))
+    {
+      rtx note = find_reg_note (insn, REG_INC, NULL_RTX);
+      if (note)
+	add_reg_note (minsn, REG_INC, XEXP (note, 0));
+    }
+#endif
+
       smove = single_set (minsn);
       gcc_assert (smove != NULL_RTX);
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 23b2a7e..4c722e7 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2013-10-31  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
+
+	* gcc.target/arm/lp1243022.c: New test.
+
 2013-10-30  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	PR other/58545
diff --git a/gcc/testsuite/gcc.target/arm/lp1243022.c b/gcc/testsuite/gcc.target/arm/lp1243022.c
new file mode 100644
index 0000000..91a544d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/lp1243022.c
@@ -0,0 +1,201 @@
+/* { dg-do compile { target arm_thumb2 } } */
+/* { dg-options "-O2 -fdump-rtl-subreg2" } */
+
+/* { dg-final { scan-rtl-dump "REG_INC" "subreg2" } } */
+/* { dg-final { cleanup-rtl-dump "subreg2" } } */
+struct device;
+typedef unsigned int __u32;
+typedef unsigned long long u64;
+typedef __u32 __le32;
+typedef u64 dma_addr_t;
+typedef unsigned gfp_t;
+int dev_warn (const struct device *dev, const char *fmt, ...);
+struct usb_bus
+{
+    struct device *controller;
+};
+struct usb_hcd
+{
+    struct usb_bus self;
+};
+struct xhci_generic_trb
+{
+    __le32 field[4];
+};
+union xhci_trb
+{
+    struct xhci_generic_trb generic;
+};
+struct xhci_segment
+{
+    union xhci_trb *trbs;
+    dma_addr_t dma;
+};
+struct xhci_ring
+{
+    struct xhci_segment *first_seg;
+};
+struct xhci_hcd
+{
+    struct xhci_ring *cmd_ring;
+    struct xhci_ring *event_ring;
+};
+struct usb_hcd *xhci_to_hcd (struct xhci_hcd *xhci)
+{
+}
+dma_addr_t xhci_trb_virt_to_dma (struct xhci_segment * seg,
+				 union xhci_trb * trb);
+struct xhci_segment *trb_in_td (struct xhci_segment *start_seg,
+				dma_addr_t suspect_dma);
+xhci_test_trb_in_td (struct xhci_hcd *xhci, struct xhci_segment *input_seg,
+		     union xhci_trb *start_trb, union xhci_trb *end_trb,
+		     dma_addr_t input_dma, struct xhci_segment *result_seg,
+		     char *test_name, int test_number)
+{
+    unsigned long long start_dma;
+    unsigned long long end_dma;
+    struct xhci_segment *seg;
+    start_dma = xhci_trb_virt_to_dma (input_seg, start_trb);
+    end_dma = xhci_trb_virt_to_dma (input_seg, end_trb);
+    {
+        dev_warn (xhci_to_hcd (xhci)->self.controller,
+                  "%d\n", test_number);
+        dev_warn (xhci_to_hcd (xhci)->self.controller,
+                  "Expected seg %p, got seg %p\n", result_seg, seg);
+    }
+}
+xhci_check_trb_in_td_math (struct xhci_hcd *xhci, gfp_t mem_flags)
+{
+    struct
+    {
+        dma_addr_t input_dma;
+        struct xhci_segment *result_seg;
+    }
+    simple_test_vector[] =
+        {
+            {
+                0, ((void *) 0)
+            }
+            ,
+            {
+                xhci->event_ring->first_seg->dma - 16, ((void *) 0)}
+            ,
+            {
+                xhci->event_ring->first_seg->dma - 1, ((void *) 0)}
+            ,
+            {
+                xhci->event_ring->first_seg->dma, xhci->event_ring->first_seg}
+            ,
+            {
+                xhci->event_ring->first_seg->dma + (64 - 1) * 16,
+                xhci->event_ring->first_seg
+            }
+            ,
+            {
+                xhci->event_ring->first_seg->dma + (64 - 1) * 16 + 1, ((void *) 0)}
+            ,
+            {
+                xhci->event_ring->first_seg->dma + (64) * 16, ((void *) 0)}
+            ,
+            {
+                (dma_addr_t) (~0), ((void *) 0)
+            }
+        };
+    struct
+    {
+        struct xhci_segment *input_seg;
+        union xhci_trb *start_trb;
+        union xhci_trb *end_trb;
+        dma_addr_t input_dma;
+        struct xhci_segment *result_seg;
+    }
+    complex_test_vector[] =
+        {
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                xhci->event_ring->first_seg->trbs,.end_trb =
+                &xhci->event_ring->first_seg->trbs[64 - 1],.input_dma =
+                xhci->cmd_ring->first_seg->dma,.result_seg = ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                xhci->event_ring->first_seg->trbs,.end_trb =
+                &xhci->cmd_ring->first_seg->trbs[64 - 1],.input_dma =
+                xhci->cmd_ring->first_seg->dma,.result_seg = ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                xhci->cmd_ring->first_seg->trbs,.end_trb =
+                &xhci->cmd_ring->first_seg->trbs[64 - 1],.input_dma =
+                xhci->cmd_ring->first_seg->dma,.result_seg = ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                &xhci->event_ring->first_seg->trbs[0],.end_trb =
+                &xhci->event_ring->first_seg->trbs[3],.input_dma =
+                xhci->event_ring->first_seg->dma + 4 * 16,.result_seg = ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                &xhci->event_ring->first_seg->trbs[3],.end_trb =
+                &xhci->event_ring->first_seg->trbs[6],.input_dma =
+                xhci->event_ring->first_seg->dma + 2 * 16,.result_seg = ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                &xhci->event_ring->first_seg->trbs[64 - 3],.end_trb =
+                &xhci->event_ring->first_seg->trbs[1],.input_dma =
+                xhci->event_ring->first_seg->dma + 2 * 16,.result_seg = ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                &xhci->event_ring->first_seg->trbs[64 - 3],.end_trb =
+                &xhci->event_ring->first_seg->trbs[1],.input_dma =
+                xhci->event_ring->first_seg->dma + (64 - 4) * 16,.result_seg =
+                ((void *) 0),
+            }
+            ,
+            {
+                .input_seg = xhci->event_ring->first_seg,.start_trb =
+                &xhci->event_ring->first_seg->trbs[64 - 3],.end_trb =
+                &xhci->event_ring->first_seg->trbs[1],.input_dma =
+                xhci->cmd_ring->first_seg->dma + 2 * 16,.result_seg = ((void *) 0),
+            }
+        };
+    unsigned int num_tests;
+    int i, ret;
+    num_tests =
+        (sizeof (simple_test_vector) / sizeof ((simple_test_vector)[0]) +
+         (sizeof (struct
+             {
+         }
+             )));
+    for (i = 0; i < num_tests; i++)
+    {
+        ret =
+            xhci_test_trb_in_td (xhci, xhci->event_ring->first_seg,
+                                 xhci->event_ring->first_seg->trbs,
+                                 &xhci->event_ring->first_seg->trbs[64 - 1],
+                                 simple_test_vector[i].input_dma,
+                                 simple_test_vector[i].result_seg, "Simple", i);
+        if (ret < 0)
+            return ret;
+    }
+    for (i = 0; i < num_tests; i++)
+    {
+        ret =
+            xhci_test_trb_in_td (xhci, complex_test_vector[i].input_seg,
+                                 complex_test_vector[i].start_trb,
+                                 complex_test_vector[i].end_trb,
+                                 complex_test_vector[i].input_dma,
+                                 complex_test_vector[i].result_seg, "Complex", i);
+        if (ret < 0)
+            return ret;
+    }
+}